... customer relationship management, (2) customer service management, (3) demand management, (4) order fulfillment, (5) manufacturing flow management, (6) supplier relationship management, (7) product ... addresses six key elements constitutes demand management, acquisition management, logistics management, disposal management, risk and performance management. Proper implementation of these elements ... Operations Management, 24, pp. 839 -850. Yen J., Langri R., (1999). Fuzzy logic: Intelligence, control and information, Prentice Hall. Zadeh L. A.: “Fuzzy sets”, Information and Control, 8 (1965) 33 8 -35 3....